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High Sensitivity 40KHz Ultrasonic Transmitter Receiver - China Suppliers & Factory Direct Offer
Technical Terms
| No. | Item | Unit | Specification |
|---|---|---|---|
| 1 | Construction | — | Open |
| 2 | Using Method | — | Transmitter / Receiver |
| 3 | Nominal Frequency | Hz | 40 ± 1.5K |
| 4 | Sensitivity | — | ≥ -75V/u Mbar |
| 5 | S P L | dB | ≥ 105 (10V / 30cm / sine wave) |
| 6 | Directivity | — | 80 ± 15 deg |
| 7 | Capacitance | pF | 2200 ± 20% @ 1KHz |
| 8 | Allowable Input Voltage | Vp-p | 40 (40KHz) |
| 9 | Detectable Range | m | 10 |
| 10 | Operating Temperature | ℃ | -40 … +85 |
Drawing (Mark: T = Transmitter, R = Receiver)
Introduction to Ultrasonic Sensors
Ultrasonic sensors are sensors developed using the characteristics of ultrasound. Ultrasonic sensors utilize the piezoelectric effect of piezoelectric ceramics. When an electric signal is applied to a piezoelectric ceramic plate, it will deform, causing the sensor to vibrate and emit ultrasonic waves. When ultrasound hits an obstacle, it reflects back and acts on the piezoelectric ceramic plate through the sensor. Based on the inverse piezoelectric effect, the ultrasound sensor generates an electrical signal output. By utilizing the principle of constant propagation speed of ultrasonic waves in the same medium, the distance between obstacles can be determined based on the time difference between transmitting and receiving signals. Ultrasonic waves will generate significant reflection echoes when they come into contact with impurities or interfaces, and Doppler effects when they come into contact with moving objects. Therefore, ultrasonic sensors are widely used in industries, civilian use, national defense, biomedicine, and other fields.
Applications
- Automotive anti-collision radar, ultrasonic ranging system, ultrasonic proximity switch.
- Remote control devices for household appliances, toys, and other electronic devices.
- Ultrasonic emission and reception devices for anti-theft and disaster prevention equipment.
- Used to drive away mosquitoes, insects, animals, etc.
Frequently Asked Questions
Q1 What is the nominal frequency of this ultrasonic sensor?
The nominal frequency of this ultrasonic sensor is 40 ± 1.5K Hz, which is the standard operating frequency for most short-to-mid range ultrasonic detection applications.
Q2 What is the maximum detectable range of this sensor?
The maximum detectable range is 10 meters. This makes it suitable for applications such as automotive anti-collision systems, proximity switches, and distance measurement devices.
Q3 What operating temperature range does this ultrasonic sensor support?
This sensor supports an operating temperature range of -40°C to +85°C, making it suitable for use in both extreme cold and high-temperature industrial environments.
Q4 What is the difference between the transmitter (T) and receiver (R) of this sensor?
The transmitter (T) emits ultrasonic waves when an electrical signal is applied, while the receiver (R) detects the reflected ultrasonic waves and converts them back into an electrical signal. Both components work together to measure distance and detect objects.
Q5 What are the typical application fields for this ultrasonic sensor?
This ultrasonic sensor is widely used in automotive anti-collision radar, industrial distance measurement, household appliance remote control, anti-theft systems, disaster prevention equipment, and pest repelling devices. Its versatility makes it suitable for both consumer and industrial applications.
Q6 What is the allowable input voltage and capacitance of this sensor?
The allowable input voltage is 40 Vp-p at 40KHz. The capacitance is 2200 ± 20% pF measured at 1KHz. These parameters are important for proper circuit design and integration into your system.